/* ═══════════════════════════════════════════════════════════
   AI4M3D — Workshop Website Stylesheet
   ECCV 2026
═══════════════════════════════════════════════════════════ */

/* ─── Variables ─────────────────────────────────────────── */
:root {
  --c-bg:         #f8fafc;
  --c-bg-alt:     #f1f5f9;
  --c-white:      #ffffff;
  --c-navy:       #0a1628;
  --c-navy-mid:   #0d1f3c;
  --c-blue:       #1a6ca8;
  --c-cyan:       #06b6d4;
  --c-indigo:     #4f46e5;
  --c-text:       #0f172a;
  --c-text-muted: #64748b;
  --c-border:     #e2e8f0;
  --c-confirmed:  #16a34a;
  --c-tentative:  #d97706;

  --font: 'Inter', system-ui, -apple-system, sans-serif;

  --sh-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --sh-md:  0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --sh-lg:  0 10px 30px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.05);
  --sh-xl:  0 20px 40px rgba(0,0,0,.12);

  --r-sm:   6px;
  --r-md:   12px;
  --r-lg:   20px;
  --r-full: 9999px;

  --ease:   cubic-bezier(0.4, 0, 0.2, 1);
  --trans:  0.3s var(--ease);

  --max-w:  1180px;
  --px:     clamp(1rem, 5vw, 2rem);
}

/* ─── Reset & Base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }

/* ─── Utilities ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--px);
}

.section {
  padding-block: clamp(4rem, 8vw, 7rem);
}

.section-alt {
  background: var(--c-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.section-tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--c-cyan);
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.2);
  padding: .25rem .75rem;
  border-radius: var(--r-full);
  margin-bottom: .75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-text);
  line-height: 1.2;
}

.section-subtitle {
  margin-top: .75rem;
  color: var(--c-text-muted);
  font-size: 1.05rem;
  max-width: 60ch;
  margin-inline: auto;
}

/* Scroll reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
[data-reveal].visible {
  opacity: 1;
  transform: none;
}

/* Stagger children inside a [data-reveal] */
[data-reveal] > *:nth-child(2) { transition-delay: .08s; }
[data-reveal] > *:nth-child(3) { transition-delay: .16s; }
[data-reveal] > *:nth-child(4) { transition-delay: .24s; }
[data-reveal] > *:nth-child(5) { transition-delay: .32s; }
[data-reveal] > *:nth-child(6) { transition-delay: .40s; }

/* ─── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.4rem;
  border-radius: var(--r-full);
  font-size: .9rem;
  font-weight: 600;
  border: 2px solid transparent;
  transition: var(--trans);
  white-space: nowrap;
}

.btn-primary {
  background: var(--c-blue);
  color: #fff;
}
.btn-primary:hover {
  background: #155e99;
  transform: translateY(-2px);
  box-shadow: var(--sh-md);
}

.btn-hero-primary {
  background: var(--c-cyan);
  color: var(--c-navy);
  font-weight: 700;
  padding: .85rem 1.8rem;
  font-size: 1rem;
}
.btn-hero-primary:hover {
  background: #22d3ee;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(6,182,212,.4);
}

.btn-hero-outline {
  border-color: rgba(255,255,255,.35);
  color: #fff;
  padding: .85rem 1.8rem;
  font-size: 1rem;
}
.btn-hero-outline:hover {
  border-color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.08);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════════════════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 68px;
  display: flex;
  align-items: center;
  transition: background var(--trans), box-shadow var(--trans), backdrop-filter var(--trans);
}

#navbar.scrolled {
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--c-border), var(--sh-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  width: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -.03em;
  flex-shrink: 0;
}
.logo-wordmark { line-height: 1; }
.nav-logo-mark {
  width: 32px;
  height: auto;
  border-radius: var(--r-sm);
  flex-shrink: 0;
}
.logo-primary { color: #fff; transition: color var(--trans); }
.logo-accent  { color: var(--c-cyan); }
.logo-year {
  font-size: .65rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: rgba(255,255,255,.55);
  text-transform: uppercase;
  transition: color var(--trans);
}
#navbar.scrolled .logo-primary { color: var(--c-text); }
#navbar.scrolled .logo-year    { color: var(--c-text-muted); }

.footer-logo .logo-primary { color: var(--c-white); }

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.nav-links a {
  font-size: .85rem;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  padding: .4rem .7rem;
  border-radius: var(--r-sm);
  transition: var(--trans);
}
.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: rgba(255,255,255,.12);
}
#navbar.scrolled .nav-links a {
  color: var(--c-text-muted);
}
#navbar.scrolled .nav-links a:hover,
#navbar.scrolled .nav-links a.active {
  color: var(--c-text);
  background: var(--c-bg-alt);
}

.nav-contact {
  background: rgba(6,182,212,.15) !important;
  color: var(--c-cyan) !important;
  border: 1px solid rgba(6,182,212,.3);
}
.nav-contact:hover {
  background: var(--c-cyan) !important;
  color: var(--c-navy) !important;
}
#navbar.scrolled .nav-contact {
  background: rgba(6,182,212,.1) !important;
  color: var(--c-blue) !important;
  border-color: rgba(6,182,212,.25);
}
#navbar.scrolled .nav-contact:hover {
  background: var(--c-blue) !important;
  color: #fff !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  padding: 4px;
  border-radius: var(--r-sm);
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: var(--trans);
}
#navbar.scrolled .nav-toggle span { background: var(--c-text); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══════════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════════ */
#hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-navy);
}

/* Background layers */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(6,182,212,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6,182,212,.07) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 30%, transparent 100%);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 30%, transparent 100%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .22;
  animation: drift 12s ease-in-out infinite;
}
.glow-1 {
  width: 700px; height: 700px;
  background: radial-gradient(circle, #1a6ca8, transparent 70%);
  top: -200px; right: -150px;
  animation-duration: 14s;
}
.glow-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #4f46e5, transparent 70%);
  bottom: -100px; left: -100px;
  animation-duration: 18s;
  animation-delay: -6s;
}
.glow-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #06b6d4, transparent 70%);
  top: 40%; left: 55%;
  opacity: .12;
  animation-duration: 10s;
  animation-delay: -3s;
}

.hero-particles {
  position: absolute;
  inset: 0;
}
.hero-particles span {
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(6,182,212,.5);
  animation: twinkle 4s ease-in-out infinite;
}
.hero-particles span:nth-child(1)  { top: 15%; left: 10%; animation-delay: 0s;    width:3px; height:3px; }
.hero-particles span:nth-child(2)  { top: 25%; left: 82%; animation-delay: .8s;   }
.hero-particles span:nth-child(3)  { top: 55%; left: 18%; animation-delay: 1.6s;  width:2px; height:2px; }
.hero-particles span:nth-child(4)  { top: 70%; left: 75%; animation-delay: 2.4s;  }
.hero-particles span:nth-child(5)  { top: 38%; left: 48%; animation-delay: .4s;   width:2px; height:2px; background:rgba(79,70,229,.6); }
.hero-particles span:nth-child(6)  { top: 80%; left: 32%; animation-delay: 1.2s;  background:rgba(255,255,255,.3); }
.hero-particles span:nth-child(7)  { top:  8%; left: 60%; animation-delay: 2.0s;  width:3px; height:3px; }
.hero-particles span:nth-child(8)  { top: 62%; left: 90%; animation-delay: .6s;   width:2px; height:2px; background:rgba(79,70,229,.5); }
.hero-particles span:nth-child(9)  { top: 90%; left: 55%; animation-delay: 1.8s;  }

/* Hero content */
.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 80px;
  padding-bottom: 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero-logo-wrap {
  margin-bottom: 1.75rem;
  animation: fadeInDown .8s var(--ease) both;
}
.hero-logo-img {
  width: 160px;
  height: auto;
}

.hero-eyebrow {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: rgba(255,255,255,.55);
  margin-bottom: 1.25rem;
  animation: fadeInDown .8s var(--ease) .05s both;
}

.hero-wordmark {
  font-size: clamp(4rem, 14vw, 9rem);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1;
  margin-bottom: .5rem;
  animation: fadeInUp .8s var(--ease) .1s both;
}
.wm-primary { color: #fff; }
.wm-accent  { color: var(--c-cyan); }

.hero-title-long {
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  font-weight: 300;
  color: rgba(255,255,255,.75);
  letter-spacing: .01em;
  margin-bottom: 1.5rem;
  animation: fadeInUp .8s var(--ease) .2s both;
}

.hero-date {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .9rem;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  padding: .5rem 1.25rem;
  border-radius: var(--r-full);
  margin-bottom: 2rem;
  animation: fadeInUp .8s var(--ease) .3s both;
}
.hero-date i { color: var(--c-cyan); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .75rem;
  animation: fadeInUp .8s var(--ease) .4s both;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255,255,255,.4);
  font-size: 1.1rem;
  animation: bounce 2.5s ease-in-out infinite;
  transition: color var(--trans);
}
.hero-scroll-hint:hover { color: rgba(255,255,255,.75); }

/* ═══════════════════════════════════════════════════════════
   ABOUT
═══════════════════════════════════════════════════════════ */
.about-text {
  margin-bottom: 2.5rem;
}

.about-text p {
  color: var(--c-text-muted);
  margin-bottom: 1rem;
  font-size: .975rem;
  line-height: 1.75;
  text-align: justify;
}
.about-text p:last-child { margin-bottom: 0; }

.about-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .75rem;
}

.pill-card {
  display: flex;
  align-items: center;
  gap: .85rem;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: .9rem 1rem;
  transition: var(--trans);
}
.pill-card:hover {
  border-color: var(--c-cyan);
  box-shadow: var(--sh-md);
  transform: translateY(-2px);
}
.pill-card > i {
  font-size: 1.1rem;
  color: var(--c-cyan);
  flex-shrink: 0;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6,182,212,.08);
  border-radius: var(--r-sm);
}
.pill-card div {
  display: flex;
  flex-direction: column;
  gap: .1rem;
}
.pill-card strong {
  font-size: .85rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.2;
}
.pill-card span {
  font-size: .75rem;
  color: var(--c-text-muted);
}

/* ═══════════════════════════════════════════════════════════
   CALL FOR PAPERS
═══════════════════════════════════════════════════════════ */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 1.25rem;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.topic-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 1.75rem 1.5rem;
  transition: var(--trans);
}
.topic-card:hover {
  border-color: var(--c-blue);
  box-shadow: var(--sh-lg);
  transform: translateY(-4px);
}

.topic-icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(6,182,212,.15), rgba(79,70,229,.1));
  border-radius: var(--r-md);
  font-size: 1.2rem;
  color: var(--c-cyan);
  margin-bottom: 1rem;
}

.topic-card h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: .6rem;
  line-height: 1.3;
}
.topic-card p {
  font-size: .85rem;
  color: var(--c-text-muted);
  line-height: 1.65;
  text-align: justify;
}

.topic-subtopics {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.topic-subtopics li {
  position: relative;
  padding-left: 1.1rem;
  font-size: .82rem;
  color: var(--c-text-muted);
  line-height: 1.5;
}
.topic-subtopics li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .55rem;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--c-cyan);
}

.cfp-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 0;
}

.cfp-guidelines,
.cfp-dates {
  background: linear-gradient(135deg, var(--c-navy) 0%, #102a52 100%);
  border-radius: var(--r-lg);
  padding: 1.75rem 2rem;
}

.cfp-guidelines h3,
.cfp-dates h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.cfp-guidelines h3 i,
.cfp-dates h3 i { color: var(--c-cyan); }

.cfp-guidelines ul {
  display: flex;
  flex-direction: column;
  gap: .55rem;
}
.cfp-guidelines li {
  position: relative;
  padding-left: 1.4rem;
  font-size: .875rem;
  color: rgba(255,255,255,.65);
  line-height: 1.6;
  text-align: justify;
}
.cfp-guidelines li i {
  position: absolute;
  left: 0;
  top: .35rem;
  color: var(--c-cyan);
  font-size: .65rem;
}
.cfp-guidelines strong { color: rgba(255,255,255,.92); }
.cfp-guidelines a { color: var(--c-cyan); text-decoration: underline; text-underline-offset: 3px; }
.cfp-guidelines a:hover { color: #fff; }

.dates-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.date-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .6rem 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  gap: 1rem;
}
.date-row:last-child { border-bottom: none; }
.dr-label {
  font-size: .85rem;
  color: rgba(255,255,255,.6);
}
.dr-date {
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
}
.dr-date.tbd { color: rgba(255,255,255,.4); font-style: italic; font-weight: 400; }
.date-highlight .dr-label { color: rgba(255,255,255,.8); font-weight: 600; }
.date-highlight .dr-date { color: var(--c-cyan); }
.dates-note {
  font-size: .75rem;
  color: rgba(255,255,255,.3);
  margin-top: .75rem;
}

/* ═══════════════════════════════════════════════════════════
   TIMELINE (DATES)
═══════════════════════════════════════════════════════════ */
.timeline {
  position: relative;
  max-width: 700px;
  margin-inline: auto;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--c-cyan), var(--c-indigo));
  border-radius: 2px;
}

.tl-item {
  position: relative;
  display: flex;
  gap: 1.5rem;
  padding-bottom: 2.25rem;
}
.tl-item:last-child { padding-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -2.75rem;
  top: .1rem;
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .8rem;
  background: var(--c-bg-alt);
  border: 2px solid var(--c-border);
  color: var(--c-text-muted);
  flex-shrink: 0;
  transition: var(--trans);
  z-index: 1;
}
.tl-item:hover .tl-dot,
.tl-highlight .tl-dot {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-navy);
  box-shadow: 0 0 0 4px rgba(6,182,212,.2);
}

.tl-body {
  flex: 1;
}
.tl-date {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: .3rem;
}
.tl-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: .35rem;
}
.tl-body p {
  font-size: .875rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}
.tl-highlight .tl-body h3 { color: var(--c-blue); }

/* ═══════════════════════════════════════════════════════════
   SPEAKERS
═══════════════════════════════════════════════════════════ */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.speaker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 2.5rem 2rem 2rem;
  transition: var(--trans);
}
.speaker-card:hover {
  border-color: rgba(6,182,212,.3);
  box-shadow: var(--sh-xl);
  transform: translateY(-4px);
}

.speaker-photo {
  width: 180px; height: 180px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 1.25rem;
  border: 3px solid var(--c-border);
  box-shadow: var(--sh-md);
  flex-shrink: 0;
}
.speaker-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.speaker-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: .4rem;
}
.speaker-org {
  font-size: .95rem;
  font-weight: 600;
  color: var(--c-blue);
  line-height: 1.4;
  margin-bottom: 1.25rem;
}
.speaker-bio {
  width: 100%;
}
.speaker-bio p {
  font-size: .875rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: .75rem;
  text-align: justify;
}
.speaker-bio p:last-child { margin-bottom: 0; }
.speaker-bio a {
  color: var(--c-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.speaker-bio a:hover { color: var(--c-cyan); }

/* ═══════════════════════════════════════════════════════════
   SCHEDULE
═══════════════════════════════════════════════════════════ */
.schedule-wrap {
  overflow-x: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  box-shadow: var(--sh-sm);
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--c-white);
  min-width: 540px;
}

.schedule-table thead tr {
  background: var(--c-navy);
}
.schedule-table thead th {
  padding: 1rem 1.25rem;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.6);
  text-align: left;
}
.schedule-table thead th:first-child { width: 100px; }

.schedule-table tbody tr {
  border-bottom: 1px solid var(--c-border);
  transition: background var(--trans);
}
.schedule-table tbody tr:last-child { border-bottom: none; }
.schedule-table tbody tr:hover { background: var(--c-bg); }

.sched-break { background: var(--c-bg-alt) !important; }

.schedule-table td {
  padding: .9rem 1.25rem;
  font-size: .875rem;
  color: var(--c-text-muted);
  vertical-align: middle;
}

.sched-time {
  font-size: .8rem;
  font-weight: 700;
  color: var(--c-text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.sched-badge {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .8rem;
  font-weight: 700;
  padding: .35rem .8rem;
  border-radius: var(--r-full);
  white-space: nowrap;
}
.sched-badge i { font-size: .7rem; }
.sched-badge.opening { background: rgba(6,182,212,.1);  color: #0891b2; }
.sched-badge.talk    { background: rgba(79,70,229,.1);   color: var(--c-indigo); }
.sched-badge.oral    { background: rgba(26,108,168,.1);  color: var(--c-blue); }
.sched-badge.break   { background: rgba(100,116,139,.1); color: var(--c-text-muted); }
.sched-badge.poster  { background: rgba(5,150,105,.1);   color: #059669; }
.sched-badge.closing { background: rgba(10,22,40,.08);   color: var(--c-navy); }

/* ═══════════════════════════════════════════════════════════
   ORGANIZERS
═══════════════════════════════════════════════════════════ */
.organizers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}

.org-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 2.5rem 1.5rem 2rem;
  transition: var(--trans);
}
.org-card:hover {
  border-color: rgba(6,182,212,.3);
  box-shadow: var(--sh-md);
  transform: translateY(-3px);
}

.org-photo {
  width: 160px; height: 160px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 1.25rem;
  border: 3px solid var(--c-border);
  box-shadow: var(--sh-md);
  flex-shrink: 0;
}
.org-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.org-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: .4rem;
  line-height: 1.25;
}
.org-inst {
  font-size: .875rem;
  font-weight: 600;
  color: var(--c-blue);
  line-height: 1.4;
}

/* ═══════════════════════════════════════════════════════════
   RELATED WORKSHOPS
═══════════════════════════════════════════════════════════ */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.related-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: 1.25rem;
  transition: var(--trans);
}
.related-card:hover {
  border-color: var(--c-cyan);
  box-shadow: var(--sh-md);
}
.related-year {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: .6rem;
}
.related-card p {
  font-size: .85rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════ */
footer {
  background: var(--c-navy);
  color: rgba(255,255,255,.7);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 2fr;
  gap: 3rem;
  padding-block: 4rem;
}

.footer-brand .footer-logo {
  display: inline-flex;
  align-items: baseline;
  gap: .2rem;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -.03em;
  margin-bottom: .75rem;
}
.footer-brand p {
  font-size: .875rem;
  line-height: 1.65;
  color: rgba(255,255,255,.45);
}

.footer-nav h4,
.footer-contact h4 {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  margin-bottom: 1rem;
}
.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.footer-nav a {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  transition: color var(--trans);
}
.footer-nav a:hover { color: #fff; }

.footer-contact p {
  font-size: .875rem;
  color: rgba(255,255,255,.45);
  margin-bottom: .75rem;
}

.footer-email {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--c-cyan);
  background: rgba(6,182,212,.1);
  border: 1px solid rgba(6,182,212,.2);
  padding: .5rem 1rem;
  border-radius: var(--r-full);
  transition: var(--trans);
  margin-bottom: .75rem;
}
.footer-email:hover {
  background: var(--c-cyan);
  color: var(--c-navy);
  border-color: var(--c-cyan);
}

.footer-pc {
  font-size: .8rem !important;
  color: rgba(255,255,255,.35) !important;
}
.footer-pc strong { color: rgba(255,255,255,.6); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 1.25rem;
  font-size: .8rem;
  color: rgba(255,255,255,.3);
  flex-wrap: wrap;
  gap: .5rem;
}
.footer-bottom strong { color: rgba(255,255,255,.5); }
.footer-eccv-logo { height: 28px; width: auto; opacity: .75; transition: opacity var(--trans); }
.footer-eccv-logo:hover { opacity: 1; }

/* ─── Back to top ───────────────────────────────────────── */
#backToTop {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 44px; height: 44px;
  background: var(--c-blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  box-shadow: var(--sh-md);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: var(--trans);
  z-index: 90;
}
#backToTop.show {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
#backToTop:hover {
  background: var(--c-cyan);
  color: var(--c-navy);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════════════
   KEYFRAMES
═══════════════════════════════════════════════════════════ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: none; }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: none; }
}
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -20px) scale(1.05); }
  66%       { transform: translate(-20px, 15px) scale(.97); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}
@keyframes twinkle {
  0%, 100% { opacity: .5; transform: scale(1); }
  50%       { opacity: 1;  transform: scale(1.6); }
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════ */

/* ── Wide tablet: grids and footer reflow ────────────────── */
@media (max-width: 1024px) {
  .topics-grid     { grid-template-columns: repeat(2, 1fr); }
  .organizers-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
  .cfp-bottom      { grid-template-columns: 1fr; }
  .footer-inner    { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand    { grid-column: 1 / -1; }
}

/* ── Hamburger: collapses nav before 6 items overflow ────── */
@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10,22,40,.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 1rem;
    border-bottom: 1px solid rgba(255,255,255,.1);
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    display: block;
    padding: .75rem 1rem;
    border-radius: var(--r-sm);
    font-size: .95rem;
  }
  #navbar.scrolled .nav-links {
    background: rgba(255,255,255,.97);
    border-bottom-color: var(--c-border);
  }
  #navbar.scrolled .nav-links a { color: var(--c-text); }
}

/* ── Tablet ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero-content { padding-top: 100px; }

  .topics-grid { grid-template-columns: 1fr; }

  /* Single-column speakers — bios are too long for 2 narrow cols */
  .speakers-grid {
    grid-template-columns: 1fr;
    max-width: 640px;
    margin-inline: auto;
  }

  /* auto-fill naturally breaks to 2 cols on small phones (~375px) */
  .organizers-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-block: 2.5rem;
  }
  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: .25rem;
  }
}

/* ── Mobile ──────────────────────────────────────────────── */
@media (max-width: 480px) {
  .hero-wordmark  { font-size: clamp(3.5rem, 18vw, 5rem); }
  .hero-content   { padding-top: 90px; }
  .hero-logo-img  { width: 120px; }
  .hero-cta .btn { justify-content: center; }

  /* Disable justify on narrow columns — creates ugly spacing */
  .about-text p,
  .topic-card p,
  .speaker-bio p,
  .cfp-guidelines li { text-align: left; }

  /* CFP boxes: tighter padding */
  .cfp-guidelines,
  .cfp-dates { padding: 1.25rem; }

  /* Speakers */
  .speakers-grid { grid-template-columns: 1fr; }
  .speaker-photo { width: 140px; height: 140px; }

  /* Organizers: explicit 2 cols as fallback */
  .org-photo { width: 110px; height: 110px; }
  .org-card  { padding: 1.75rem 1rem 1.5rem; }
}

/* ── Very small screens ──────────────────────────────────── */
@media (max-width: 360px) {
  .hero-wordmark { font-size: 3rem; }
  .org-photo     { width: 90px; height: 90px; }
}